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  • Title: Use of a semen extender containing antibiotic to improve the fertility of a stallion with seminal vesiculitis due to Pseudomonas aeruginosa.
    Author: Blanchard TL, Varner DD, Love CC, Hurtgen JP, Cummings MR, Kenney RM.
    Journal: Theriogenology; 1987 Oct; 28(4):541-6. PubMed ID: 16726337.
    Abstract:
    A breeding trial was conducted to determine if a semen extender containing polymixin-B sulfate would improve the fertility of a stallion with seminal vesiculitis due to Pseudomonas aeruginosa . Twenty-three mares were bred to the stallion by one of three methods: artificial insemination with raw semen (Group 1, n = 10), artificial insemination with semen mixed 1:1 with a nonfat dry skim milk/glucose extender containing 1000 units/ml polymixin-B sulfate (Group 2, n = 9), or natural service immediately following infusion of the uterus with 100 ml of the same extender (Group 3, n = 4). Artificial breedings contained a minimum insemination dose of 500 x 10(6) progressively motile spermatozoa. All mares were bred every other day while in estrus. Pregnancy status was determined by transrectal ultrasound examination 15 d after the last breeding. First-cycle pregnancy rate for Group 2 mares (78%) was greater (P < 0.01) than for Group 1 mares (10%). There was a tendency (P = 0.10) for the pregnancy rate of Group 3 mares (50%) to be greater than Group 1 mares. The use of a semen extender containing polymixin-B sulfate improved the fertility of this stallion.
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